This file gathers jointly info and knowledge on classifying damaging locations.IChemE, the establishment of Chemical Engineers, is the heart for chemical, biochemical and method engineering execs around the world. we're the center of the method group, selling competence and a dedication to sustainable improvement, advancing the self-discipline for the advantage of society and helping the pro improvement of individuals. a few of the parts we submit in comprise: -Safety within the method industries - the BP strategy protection series-Consultancy for chemical engineers-Project administration within the approach industries-Contract administration within the technique industries - foreign varieties of agreement series-Communication abilities for engineers

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Work of a rather tentative nature has been done on an ignition model. The purpose of this model is to explore the different types of 24 CLASSIFICATION OF HAZARDOUS LOCATIONS: PROJECT STRATEGY ignition which together determine the overall ignition probability. These include ignition within a zone, ignition in a non-hazardous area and selfignition. This model is speculative, but does draw attention to a number of key features. A discussion of the outcome of these quantitative approaches is given in Section 22.

This contrasts with the number of leak sizes used in the previous section, which was based on industrial practice. 2 LEAK FREQUENCY AND HOLE SIZE DISTRIBUTION: ADOPTED VALUES From the estimates given in Appendix 8 values of leak frequency and leak size have been adopted for use in conjunction with the equivalent standa'rd plant described in Section 8. 1. 1 have been used as the initial values in the numerical investigation of fires and vapour cloud explosions in Section 18. 2. OlA where A is cross-sectional area of pipe.

For centrifugal pumps and compressors there is a range of sizes, depending on the type of seal and on the shaft diameter. 35 CLASSIFICATION OF HAZARDOUS LOCATIONS While the foregoing approach is in line with that generally adopted in hazardous area classification work, it is rather arbitrary. An attempt has therefore been made to obtain estimates of leak frequency and hole size from the literature on hazard assessment which can be cross-checked with historical data on fire and vapour cloud explosions on plant.